US4530475A - Magnetic tape cassette with windows - Google Patents

Magnetic tape cassette with windows Download PDF

Info

Publication number
US4530475A
US4530475A US06/629,128 US62912884A US4530475A US 4530475 A US4530475 A US 4530475A US 62912884 A US62912884 A US 62912884A US 4530475 A US4530475 A US 4530475A
Authority
US
United States
Prior art keywords
cassette
housing
webs
transparent members
windows
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/629,128
Other languages
English (en)
Inventor
Ottmar Buerkle
Kurt Schmidts
Alfred Schneider
Walter Schuett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Assigned to BASF AKTIENGESELLSCHAFT, reassignment BASF AKTIENGESELLSCHAFT, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BUERKLE, OTTMAR, SCHMIDTS, KURT, SCHNEIDER, ALFRED, SCHUETT, WALTER
Application granted granted Critical
Publication of US4530475A publication Critical patent/US4530475A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
    • G11B23/08707—Details
    • G11B23/08785—Envelopes

Definitions

  • the present invention relates to a tape cassette, in particular a magnetic tape cassette, with one or more hub or reel for the tape and a cassette housing, surrounding these, which possesses windows which are formed by apertures in the housing and transparent members which cover these apertures, and to a window arrangement for such a cassette.
  • Magnetic tape cassettes in particular compact cassettes, having, in plan view, one window located between the apertures which receive the winding spindles of the apparatus have been disclosed, for example, in German utility model No. 76 37,787 and U.S. Pat. Nos. 2,988,295 and 3,565,367. In these cassettes, only the middle portion of the tape roll is visible from the outside.
  • U.S. Pat. No. 3,074,841 discloses an elongate rectangular window extending over the apertures which the drive spindles enter.
  • the first object is achieved by a tape cassette, especially a magnetic tape cassette, which has one or more windows formed by an aperture in a largely rectangular cassette housing and a transparent member covering this aperture, if there are at least two windows separated by a separator housing member and located on a common carrier. This makes it simple to provide more than one window, at points of the housing remote from one another, without having to bear additional assembly costs.
  • the second object is achieved by a window arrangement wherein two windows are joined to one another by webs acting as carriers.
  • the housing member carrying the windows can possess apertures and recessess for the windows and carrier. Consequently, the windows and carriers can be in the same plane as the inner walls of the housing, or lower than these.
  • the recesses can be provided at the edge of the apertures of the housing and/or on the separator housing member, thus providing a solution to positioning and sealing problems.
  • the windows can also be constructed with one or more passages for one or more spindles.
  • the carrier for the windows can consist of narrow webs which define a hole.
  • the amount of material required can be kept low, whilst yet providing adequate mechanical strength of the housing and of the window carrier arrangement, even in automated manufacture.
  • the gate mark of the molding is located on one of the webs, so that tolerances resulting from the process are distributed symmetrically over the windows.
  • the recesses on the housing are advantageously narrow grooves corresponding to the webs and running parallel to the transverse face of the cassette, for accurate location of the windows relative to the spindles.
  • the hole between the webs is also delimited, on the other two sides, by fixing edges, thereby giving a firm and tight construction in the center portion of the cassette.
  • novel window arrangement can be further improved if the webs and/or the windows possess locating faces for correct positioning on the housing of the cassette, thereby achieving very reliable assembly of the cassette, even if this assembly is automated.
  • each window has a passage for a spindle and a bearing collar for a hub.
  • fixing edges are provided, at least at the periphery, preferably on the long sides of the window arrangement.
  • FIG. 1 shows a compact cassette, with two horizontal windows on the top face, in perspective
  • FIG. 2A shows the upper part of the housing of the cassette of FIG. 1,
  • FIG. 2B shows a first window arrangement with a plate-shaped carrier
  • FIG. 3 shows a second window arrangement with webs as the carrier
  • FIG. 4 shows a housing member, without windows, in plan view from within
  • a compact cassette 5 comprises essentially the housing 4, with upper and lower parts 6 and 7, which are connected by, for example, screws. Apertures or passages 9 and 10 allow passage of the spindles of the apparatus. Behind the passages 9 and 10 are the hubs 11 and 12, whose drive pegs 13 for the spindles are also visible. Two identical window apertures 14a and 14b are provided on the connecting axis of the centers of the passages 9 and 10.
  • the inner edges of the apertures 14a and 14b are semicircles, of diameters roughly corresponding to the external diameters of the hubs 11 and 12. The diameter can however also be smaller or larger than these. Accordingly, with the housing 4 opaque and in a darker color, the hubs 11 and 12, which are mostly lighter in color, appear to be mounted in a fork-shaped holder.
  • the window apertures 14a and 14b extend linearly to the outer edges 15 of the housing, in the embodiment shown the short sides of the substantially rectangular housing.
  • the shape and arrangement of the window apertures 14 is optional as long as the strengths demanded of magnetic tape cassettes is preserved; this can be achieved by appropriate choice of the material of construction.
  • the window apertures 14a and 14b are covered by transparent members 16a and 16b which form the actual windows. In FIG. 1B, the members 16a and 16b are located on a common plate-shaped carrier 17 and can be manufactured in one piece therewith.
  • the transparent members and carrier are hereafter referred to conjointly as the "window arrangement".
  • the transparent members 16 are provided with edge portions 24, bent upwards at a right angle and having a height corresponding, for example, to half the height of the narrow sides of the housing 4, so that after assembly of two housing members 6 and 7, having identical window arrangements, the standard cassette side height results.
  • Tape rolls 19 and 20, a magnetic tape 21 and tape guide levers 22 and 23 are provided in the cassette 5.
  • Bearing collars or rings 18 for the hubs 11 and 12 are provided around the passages 9 and 10 of the windows (see FIG. 3).
  • a carrier 17 has a thickness d, and the cassette internal dimensions are reduced by twice this thickness. In cassettes where only these internal dimensions matter, a corresponding change in the external dimensions, whilst keeping the wall thickness the same, is readily possible.
  • the external dimensions are also standardized, and therefore cannot be changed.
  • a reduction in wall thickness of the cassette by an amount corresponding to the thickness d can substantially detract from the strength of the cassette. It is possible to reduce the thickness of d to, for example, film thickness, and, in compensation, transport and handling of the two windows jointly is attainable.
  • the windows can be fixed to such a film in a suitable manner, for example by means of a self adhesive film, by adhesion forces or by electrostatic attraction.
  • FIG. 3 shows a further advantageous embodiment of the window arrangement 36, wherein the carrier for the windows 16a and 16b essentially consists of webs 37.
  • These webs 37 have, for example a thickness of 0.7 mm and a width of 2.9 mm and consist of the same material as the windows 16, for example polystyrene.
  • the webs 37 are sufficiently strong to impart adequate flexural strength to the window arrangement, so that the latter can, after having been produced, automatically be taken out of the mold and threaded up, preferably utilising the hole 38, on magazine rods.
  • the gate mark 39 is advantageously on one of the webs 37, so that the tolerances, resulting from the method of manufacture, can be distributed from the center of the arrangement in both directions, giving symmetrical conditions for the two windows 16a and 16b.
  • the gate mark 39 advantageously faces the inner wall of the housing, avoiding an objectionable bump in the middle of the cassette.
  • the ejection points 41 of the arrangement 36 from the injection mold are advantageously in the vicinity of the free ends of the windows 16a and 16b.
  • the grooves 42 are provided as recesses corresponding to the webs 37, and advantageously run parallel to the front face 36 of the cassette. Fixing edges 43 are provided on the peripheries of the apertures 14a and 14b of each housing member, 6 and 7 respectively, the depth of which, like that of the grooves 42, corresponds roughly to the thickness d of the webs 37.
  • a positioning protrusion 44 is provided in the center of each housing member 6 and 7, so as to permit accurately fitting insertion of the window arrangement 36.
  • the shape of the hole 38 and protrusion 44 is that of a rectangle with pushed-in sides. The relatively long sides of the rectangle provide positioning faces for the corresponding locating faces of the webs 37 and windows 16a and 16b.
  • Fixing edges 45 on the arrangement 36 correspond to the fixing edges 43 on the housing member 6 or 7.
  • the window arrangement 36 is fixed in a suitable manner, for example, by welding, giving a good seal between the housing member 6 or 7 and the said window arrangement.
  • a plane surface on the same level consisting of the inner part-faces of the protrusion 44, the windows 16a and 16b and the housing inner walls 46 and 47. This ensures that the housing inner walls still serve to guide the tape and tape roll in spite of the insertion of large windows.
  • the requisite high flexural strength of the housing parts 6 and 7 before being assembled with the window arrangement is also ensured by suitable choice of the material of construction and design of the "wasp-waist" (separator housing member 40) of the parts of the housing.
  • the parts 6 and 7 can be either partially transparent or completely opaque, depending on the materials used.
  • window arrangements are also conceivable, for example by providing several windows, arranged in a radial pattern around the passages 9 or 10, with corresponding radial webs as carrier members.
  • a window arrangement according to the invention it is basically not important what the shape and arrangement in the cassette housing is, provided the windows are at a distance from one another and the windows encompass one or more transparent or opaque separator housing members.

Landscapes

  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Magnetic Record Carriers (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
US06/629,128 1981-08-26 1984-07-09 Magnetic tape cassette with windows Expired - Fee Related US4530475A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19818124876U DE8124876U1 (de) 1981-08-26 1981-08-26 Magnetbandkassette mit fenster und fensteranordnung dafuer
DE8124876[U] 1981-08-26

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06410839 Continuation 1982-08-23

Publications (1)

Publication Number Publication Date
US4530475A true US4530475A (en) 1985-07-23

Family

ID=6730648

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/629,128 Expired - Fee Related US4530475A (en) 1981-08-26 1984-07-09 Magnetic tape cassette with windows

Country Status (9)

Country Link
US (1) US4530475A (ja)
EP (1) EP0073010B1 (ja)
JP (3) JPS5841471A (ja)
KR (1) KR840001367A (ja)
AT (1) ATE25889T1 (ja)
AU (1) AU551332B2 (ja)
DE (2) DE8124876U1 (ja)
HK (1) HK80287A (ja)
ZA (1) ZA826181B (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4740857A (en) * 1983-07-25 1988-04-26 Victor Company Of Japan, Limited Tinted tape cassette having an optical tape sensing construction
US4993661A (en) * 1989-05-12 1991-02-19 Minnesota Mining And Manufacturing Company Tape cassette with tape leader detection improvements
US5014150A (en) * 1988-04-21 1991-05-07 Reel/Frame: 5061/0928 Agfa-Gevaert Aktiengesellschaft Magnetic tape cassette having outer appearance modified by surface printing
US5054616A (en) * 1990-01-29 1991-10-08 Shape, Inc. Removable windows for video tape cassette and related methods of assembly
US5177655A (en) * 1990-02-26 1993-01-05 Sony Corporation Tape cassette with general purpose polystyrene body colored by controlled amounts of rubber component and pigment
US5264987A (en) * 1991-06-14 1993-11-23 U.S. Philips Corporation Cassette for magnetic tape provided with window
US5798899A (en) * 1989-10-20 1998-08-25 Hitachi Maxwell, Ltd. Tape cartridge with an upper case wall cover plate

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6060082U (ja) * 1983-09-29 1985-04-26 ソニー株式会社 テ−プカセツト
JPS6089678U (ja) * 1983-11-25 1985-06-19 ソニー株式会社 テ−プカセツト
JPH0441502Y2 (ja) * 1986-02-04 1992-09-29
JPH0525097Y2 (ja) * 1987-05-29 1993-06-24
EP0518433B1 (en) * 1991-06-14 1997-05-14 Koninklijke Philips Electronics N.V. Cassette provided with magnetic tape on two coplanar reels
DE9110481U1 (ja) * 1991-08-24 1991-11-07 Basf Magnetics Gmbh, 6800 Mannheim, De

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166593A (en) * 1977-01-31 1979-09-04 U.S. Philips Corporation Cassette housing with integral tape guide
US4227622A (en) * 1978-07-04 1980-10-14 Tdk Electronics Company, Limited Tape cassette
US4363456A (en) * 1979-11-15 1982-12-14 Hitachi Maxell, Ltd. Magnetic recording tape cassette
FR2512254A3 (fr) * 1981-08-26 1983-03-04 Basf Ag Cassette de bande, en particulier cassette de bande magnetique a voyant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US370841A (en) * 1887-10-04 wright
US2988295A (en) * 1954-10-05 1961-06-13 Loewe Siegmund Magazine for magnetic tape reels
US3704841A (en) * 1971-01-28 1972-12-05 Memorex Corp Magnetic tape cartridge
CH526834A (fr) * 1971-02-12 1972-08-15 L Somers S Brice Cassette à deux moyeux pour bande magnétique
JPS5012349U (ja) * 1973-05-28 1975-02-07
US4368860A (en) * 1979-12-06 1983-01-18 Hitachi Maxell, Ltd. Magnetic recording tape cassette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166593A (en) * 1977-01-31 1979-09-04 U.S. Philips Corporation Cassette housing with integral tape guide
US4227622A (en) * 1978-07-04 1980-10-14 Tdk Electronics Company, Limited Tape cassette
US4363456A (en) * 1979-11-15 1982-12-14 Hitachi Maxell, Ltd. Magnetic recording tape cassette
FR2512254A3 (fr) * 1981-08-26 1983-03-04 Basf Ag Cassette de bande, en particulier cassette de bande magnetique a voyant

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4740857A (en) * 1983-07-25 1988-04-26 Victor Company Of Japan, Limited Tinted tape cassette having an optical tape sensing construction
US5014150A (en) * 1988-04-21 1991-05-07 Reel/Frame: 5061/0928 Agfa-Gevaert Aktiengesellschaft Magnetic tape cassette having outer appearance modified by surface printing
US4993661A (en) * 1989-05-12 1991-02-19 Minnesota Mining And Manufacturing Company Tape cassette with tape leader detection improvements
US5798899A (en) * 1989-10-20 1998-08-25 Hitachi Maxwell, Ltd. Tape cartridge with an upper case wall cover plate
US5054616A (en) * 1990-01-29 1991-10-08 Shape, Inc. Removable windows for video tape cassette and related methods of assembly
US5177655A (en) * 1990-02-26 1993-01-05 Sony Corporation Tape cassette with general purpose polystyrene body colored by controlled amounts of rubber component and pigment
US5264987A (en) * 1991-06-14 1993-11-23 U.S. Philips Corporation Cassette for magnetic tape provided with window

Also Published As

Publication number Publication date
JPH0437353Y2 (ja) 1992-09-02
JPS5841471A (ja) 1983-03-10
EP0073010B1 (de) 1987-03-11
ATE25889T1 (de) 1987-03-15
JPH0376273U (ja) 1991-07-31
DE8124876U1 (de) 1982-03-04
AU8757882A (en) 1983-03-03
KR840001367A (ko) 1984-04-30
EP0073010A3 (en) 1983-08-10
HK80287A (en) 1987-11-06
EP0073010A2 (de) 1983-03-02
JPH0621103Y2 (ja) 1994-06-01
ZA826181B (en) 1983-07-27
JPH0389577U (ja) 1991-09-12
DE3275672D1 (en) 1987-04-16
AU551332B2 (en) 1986-04-24

Similar Documents

Publication Publication Date Title
US4530475A (en) Magnetic tape cassette with windows
EP0152693B2 (en) Magnetic tape cassettes
EP0136504A1 (en) Tape cartridge
EP0071996B1 (en) Magnetic recording tape cartridge
US4166593A (en) Cassette housing with integral tape guide
US3642228A (en) Magnetic tape cassette
US4773614A (en) Tape cassette
KR900001104B1 (ko) 객체로 된 테이프 안내물을 갖는 테이프 카세트
US4566653A (en) Tape cassette comprising a substantially rectangular two-part housing
EP0139146A2 (en) Recording disc cartridge
US5362172A (en) Press fit assembly boss for diskettes
US5626305A (en) Tape cassette having ribs and window
US4546936A (en) Magnetic tape cassette casing
US5174520A (en) Tape cassette reel having an upper reel portion formed by dichromatic molding method
US4137555A (en) Magnetic head
JPH0454629Y2 (ja)
JPH0135293Y2 (ja)
US5530610A (en) Magnetic tape cassette
JPS639882Y2 (ja)
JPS6327324Y2 (ja)
JPS6336539Y2 (ja)
JPH0433534A (ja) ステッピングモータ用ヨークおよびそのヨークのインサート成形法
KR900009365Y1 (ko) 자기 헤드의 조립 구조
JPH054146Y2 (ja)
JPS5919945Y2 (ja) 磁気ヘツド

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: BASF AKTIENGESELLSCHAFT, 6700 LUDWIGSHAFEN, RHEINL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:BUERKLE, OTTMAR;SCHMIDTS, KURT;SCHNEIDER, ALFRED;AND OTHERS;REEL/FRAME:004396/0344

Effective date: 19820908

FPAY Fee payment

Year of fee payment: 4

LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19930725

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362